n. Foam, froth, or suds made from soap moistened with water, as by a brush for shaving.n. Foam or froth formed in profuse sweating, as of a horse.To form a foam or suds, as soap and water; become froth or frothy matter.To spread lather on or over; apply lather to, as the face in shaving.To flog; leather.n. A work-man who puts up laths for plaster-work.n. A dialectal variant of ladder.